Coating for railroad ties and method of applying the same



G. H. HARDMAN. COATING FOR RAILROAD TIES AND METHOD OF APPLYING THE SAME.

APPLICATION men APR.5, 1922.

1,413,708, PatentedJun ,1922.

ATTORNEY til ii lit ifii COATING FOR RAILROAD TIES AND .lViETHOD OF APPLYING- THE SAME.

Application filed April 5,

To a i /mm it may concern:

l e it known that l, Gnonon H. HARDMIAN, a citizen oi the United States, residing at Fall River, in the county of Bristol and State of lilassachusetts, have invented certain new and useful Improvements in outings tor Railrmid Ties and Methods of i-ipplying the flame. of which the following is a specification.

My invention relates to rail-road ties and more particularly to those constructed of wood.

'ilhe essential objects of my invention are the preservation of: the tie against heat, cold, moisture, and climatic conditions whereby its period of utility is prolonged, and to attain this end by a simple and inexpensive means.

To the above ends essentially my invention consists in such parts and in such c01nhinations of parts, and in such steps and succession of steps as fall within the scope oi the appended claims.

In the accompanying drawings which .lorui a part of this specifi ation Figure 1 is perspective view of a rail.- road tie embodying my invention, and

l igure 2. a transverse section of the same.

Like reference characters parts throughout the views.

In the drawings i'i represents the body of :1 wooden railroad tie which may be of any usual preferred construction either solid or sectional. In the form thereof herein shown the body is sectional comprising longitudinully disposed strips 7 through which pass transverselyat intervals belts or tie rods 10 provided with bifurcated ends forming straps or fingers l2 embracing the body seated in peripheral grooves 13 therein.

indicate like Enclosing the exterior of the body is a Specification of Letters Patent.

1922. Serial No. 549,919.

covering of asphalt and abestos. The method of applying the covering herein shown consists in surrounding the body with a film or thin layer 15 of a preservative such as asphalt. This may be done by dipping the body 5 into hot liquid asphalt. Next a film or thin layer 17 of asbestos is applied by rolling the asphalt covered body in a mass of pulverized asbestos while the asphalt is still hot and soft, or by blowing the asbestos upon the same while in the described condition; or by rubbing the asbestos into the asphalt.

For the purpose of illustration the thickness of each of the films or layers 15 and 17 are herein shown greatly exaggerated.

The asbestos coating prevents the cracking; of the asphalt by cold or the melting of the same by heat which would otherwise occur.

I claim v 1. In a rail-road tie, the combination of the body and a coating of asphalt and asbestos enclosing the body.

2. ln a rail-road tie, the combination of the body, and a coating comprising a layer of asphalt surrounding the body. and a layer of asbestos superposed on the layer of asphalt. Y

8. The method of preserving: wooden railroad ties consisting in covering the tie with a coating of hot asphalt. and next applying a coating of asbestos to the first coating while the asphalt is in an unhardened state.

4. The method of preserving wooden railroad ties consisting in covering the tie with an adhesive coating, and next applying. a coating of asbestos to the first coating.

in testimony whereof I have afliXed. my

signature.

GEORGE H. HARDMAN. 

